Highly luminescent core-shell InP/ZnX (X = S, Se) quantum dots prepared via a phosphine synthetic route

Natalia Mordvinova 1 Alexander Vinokurov 2 Tatiana Kuznetsova 2 Oleg I. Lebedev 1 Sergey Dorofeev 2
1 CRISMAT - Laboratoire de cristallographie et sciences des matériaux
2 MSU - Lomonosov Moscow State University
Abstract : Here we report a simple method for the creation of highly luminescent core-shell InP/ZnX (X = S, Se) quantum dots (QDs) on the basis of a phosphine synthetic route. In this method a Zn precursor was added to the reaction mixture at the beginning of the synthesis to form an In(Zn) P alloy structure, which promoted the formation of a ZnX shell. Core-shell InP/ZnX QDs exhibit highly intensive emission with a quantum yield over 50%. The proposed method is primarily important for practical applications. Advantages of this method compared to the widely used SILAR technique are discussed. We further demonstrate that the SILAR approach consisting of consequent addition of Zn and chalcogen precursors to pre-prepared non-doped InP colloidal nanoparticles is not quite suitable for shell growth without the addition of special activator agents or the use of very reactive precursors.
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https://hal-normandie-univ.archives-ouvertes.fr/hal-02175426
Contributeur : Elisabeth van T Hof <>
Soumis le : vendredi 5 juillet 2019 - 17:01:34
Dernière modification le : mercredi 4 septembre 2019 - 17:36:03

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Natalia Mordvinova, Alexander Vinokurov, Tatiana Kuznetsova, Oleg I. Lebedev, Sergey Dorofeev. Highly luminescent core-shell InP/ZnX (X = S, Se) quantum dots prepared via a phosphine synthetic route. Dalton Transactions, Royal Society of Chemistry, 2017, 46 (4), pp.1297-1303. ⟨10.1039/c6dt03956a⟩. ⟨hal-02175426⟩

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